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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2,4-Dichlorophenoxyacetic Acid; Hedonal; Trinoxol

OSHA IMIS Code Number: 0846

Chemical Abstracts Service (CAS) Registry Number: 94-75-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: AG6825000; 2043

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: NA2765 Poison

Chemical Description and Physical Properties:
Colorless, odorless solid.
molecular weight: 221
boiling point: Decomposes
vapor pressure: approx 0 mm
melting point: 284°F
Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):
General Industry: 10.0 mg/m3

Construction Industry: 10 mg/m3 TWA
American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m3 TWA

Health Factors

Carcinogenic Classification:
International Agency for Research on Cancer (IARC): Group 2B, possibly carcinogenic to humans (Chlorophenoxy Herbicides)
Potential Symptoms: Weakness, stupor; hyporeflexia, muscle twitching; convulsions; dermatitis. In animals: liver, kidney damage

Health Effects: Mutagen (HE3); CNS effects (HE7)

Affected Organs: Skin, CNS

Date Last Revised: 12/01/1998

NIOSH/OSHA/DOE Health Guideline: 2,4-D (Dichlorophenolxyacetic Acid)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • sampling media: Glass Fiber Filter (Gelman Type AE or equivalent)
    maximum volume: 200 Liters REC F: 3.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/UL50.
    method reference: 1,2 OSHA modified NIOSH 5001 [23 KB PDF, 4 pages]
    sampling and analytical error: 0.08
    method classification: Fully Validated
Conditions: Methanol extraction, u Bondapak, C18 column; 55% Methanol 44% water 1% acetic acid; 1.3 mL/min; UV det: 254,280; Retention time, 14 min.

Bulk Method: Limit the amount of bulk submitted to one gram or one mL.

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